【Expandable with Flight in Mind & 3-Stage Adjustable Handle】 Designed for in-flight travel, business trips, and vacations, this suitcase features an expandable zipper closure. By expanding the gusset by approximately 5cm, the capacity increases by about 20%, providing peace of mind even if you acquire more luggage or souvenirs during your trip. The lightweight and durable aluminum alloy handle can be adjusted to three stages with a one-push operation, allowing you to customize the height to your needs. 【Separate Wet/Dry Storage, Hanging Storage, and Dust Cover】 Equipped with a wet/dry separation bag to store wet and dry items separately. Inside, there are convenient pockets for temporarily storing small items, smartphones, documents, and tickets. A dust cover is included for dust-proof storage when not in use, and it can be folded for storage. 【Removable Double Casters with Brakes】 Durable double casters provide smooth 360-degree rotation for comfortable travel. The design reduces vibration and noise during travel, ensuring stable movement even on uneven surfaces. The brake function provides peace of mind on trains and slopes. The casters are removable for easy cleaning, storage, and replacement. 【Durable Hard Body & YKK Zippers】 The hard-type body combines ABS resin and PC (polycarbonate) resin, achieving both lightness and impact resistance. The main zipper uses reliable YKK zippers, ensuring long-term stable use. Suitcase Carry Case with Expansion Function, Large Capacity, Large Size, Impact Resistant, Ultra-Lightweight Carry Bag, 360-degree Rotation, Stopper, Silent, luggage suitcase, Carry-on, Multi-functional, TSA Lock, Travel, Business Trip (Silver, M Size: 4-7 Nights/60L)